[asterisk-users] Different codecs for reading and writing

[Gordon Henderson]

On Mon, 3 Aug 2009, Elliot Murdock wrote:

> Hello Everyone!
>
> Thank you for all the information.
>
> I am wondering how the Asterisk community has been working on
> solutions to deal with the asymmetric quality of ADSL.   Voip is
> becoming popular and a bottleneck does exists on the ADSL upload side.

What bottleneck?

Distance limitations aside for *DSL technologies, I think what we get 
where I am is more than enough for your average SME. 830Kb/sec upload 
speed is OK for 10 concurrent G711 calls or a few dozen G729 calls.

My view is that if a business really does need more concurrent calls than 
that, then there are alternative technologies avalable which are more 
suited to the larger enterprise - SDSL where avalable, or traditional 2Mb 
leased lines, or 10Mb LAN extension type circuits.

And lets not forget that the ADSL backhaul is a contended service (at 
least where I am). You're not going to get any guarantees all that 
830Kb/sec is going to be avalable all the time, but where you are things 
may well be different.

Gordon